To hupp motor car cor



E. S. MaCPHERSON CRANK CASE VENTILATOR Noi-11,1930.

Filed Nov. 15t 1925.

naman Patented Nov. 1l, 1930 N UNITEDSTATES PATENT oFFicn (iRANK-CASE vnnrrnaroa o Application filed November 15, 1926. Serial No. 148,569.

l j VThis inventionrelates'to crank case ventilators and more especially to means `for venprovide a crank casebreather in conjunction -tilating the crank case ofinternal combustion engines and the like. o

It is now generally customary, in the manufacture `of internal" combustion engines, to

" with the Aoilfiller spout or inlet. However,

such breather openings do not adequately ventilate the crank `case principally because no provisionis made for inducing or proplates the provision` of a vacuum1 inducing Vmeans connected to the crank case and a source of airv supply also connectedV to the crank case.A fVVhilethe air inlet is preferably auxiliary to the customary breather opening, nevertheless, it will be obvious as this descriptionproceeds that the breather opening may be employed for supplying an amount of air to the crank case suflicient to dissipate the Veffects in the vacuum induced therein.

Among` the advantages obtainable from a thorough ventilation of the crank case is that when the engine is operated in cold Weather this ventilation prevents the formation of moisture and thus practically eliminates .the corrosion of the bright metal parts by moisture and by acid.

The several objects, advantages and novel detailsof construction of this invention will be made more apparent as this description proceeds especially When considered in connection withV the 'accompanying drawings wherein liigure` 1, is a sectional elevational view ilf lustrating fragmentarily a crank case and the appurtenances of an'internal combustion `With and,

engine With my inventionjassociated there- Figure 2, is a'l front elevation partly in vertical sectionofthe structure illustrated in Figure 1.

Referring now more particularly to the S. MACPHERSQN, OF DETROIT, MICHIGAN ASSIGNOR TO HUP? MOTOR CAR COR-x PORATION, F DETROIT, LEECEGAN, A CORPORATEON OF VIRGINIA drawingsvvherein like` reference characters indicate like parts it will be noted that there is illustrated fragmentarily the Wall of `the crank case of an internal combustion engine to which 1s connected the oil filleryvf" spout 11 provided with the customary removable cover 12 for closing the open `end thereof. lhis Icover 12 is provided with breather openings 13.

The reference character lll indicates the;

exhaust `manifold of the internal combustion engine and 15 a sleeve-like coupling member inserted therein. This sleeve provides means for mounting and positioning Within the eX- hjaust pipe and in the path of the exhaustrlffi" ,frases the outiot end of an ejector pipe 16.

For convenience in manufacture and assem-` bly the outlet end ofthe ejector pipe may be in the form'of an elbow 17 Which is seciued to and carried by the sleeve 15. Theto open end 18 thereof extends in the direction ofthe flovv of the exhaust gases so that when fthe engine is running a vacuum is created in the ejector pipe 16` for the purpose of inducing a partial vacuum in the crank case.;` f

as Will appear more fully hereinafter.

The other end of the ejector pipe is connected by means of the union 19 to the Wall 20 cfa chamber 21 communicating with the interior ofthe crank case. vious that `the inlet end ofzthe ejector pipe might be just as readily connected to the crank case iti has been found that it is more convenient for manufacturing and assembly purposes to provide the auxiliary chamber;`

:21. The inlet end of the ejector pipe is protected by means cfa baffle 22 which will prevent oil in any `znipreciable quantity being` drawn through this ejector pipe. The

end of the `pipe is further protected by means;` `of axscreen 9.3I which will prevent the entrance of foreign matter which would tend to clog up the pipe. j j i In vFigureV 2 the reference `character 24 indicatesgenerally the carburetor of thein-z, ternal combustion engineand 25 an air cleaner which constitutesthe air inlet or supply for the carburetor.` A. conduit 2G `connects air cleaner 25 to carburetor 24 and communi- While it isole-5` connectedy t an opening `28 formed in the filler spout 111. Thus a portion of theV air Y" .will create a vaciiumin the ejector pipel fwhich Willdravv air, troinfthe crankvcase as flowing tothe carburetor may pass through conduit 27, opening 28 and iller spout l1 andV into the Vcrank case to supply the quantity. of air needed lto dissipate or offset the vacuum Vinduced. by the ejector pipel. YIt'lhas been i found to bev efiicient and practical to form the conduit 26 `and conduitV 27 of an integraly castingr theconduit .27. constituting aklateral extension of the sleeve-like conduit26 Vas by such a construction thisunit may be'conl nected to thefiller spoutll byineans ofa'vb'olt 29 in a manner most.clearlyillustrated in Figure l. l

. j 4lll/'ith the*Y .herein describedV Vconstruction a' positive source of circulationof `air isproe' vided through the crank casegduring those i periods .thatthe engine isrnnning. *The oW ofex'haust through the exhaust pipes la f suggested by the arrov'vsjand as aconsewhenv desired, beY supplied throughthe cus- 1 quencefof the connection between" the crank case andthe carburetor air inlet the air thus lWithdrawn from the crank case Will'be supvpliedffrom .this air source. u It is evident, however,V that While lthe .preferred embodiamentfot theinvention herein described conf templates Y auxiliary source of air. that Vthe air'v'vith'dravvn'ffrom the crank casev may',

. tomary breather opening.`

ed to inthe details ofconstructi'onand the arrangement and association of parts as may;V

be found necessary ore'xpe'dient and to this end reservation is made toi'nakeV such changes asmay come Within thev purview ofthe ac- 'g .n Win also be evident a those Skandia this art thatvarious changes may be resort# companying claims. Y

What I claim-as my invention isz-pf it. In combination,- acrank `case having'an'vi t 'oi1` tiller spout',fan exhaustvmanifold,'an .air supply and ventilatingmeans :tor'saidcr'ank i i "case vincludingmeans connecting saidfcrank "f 'Y case tojsaid manifoldforinducing a vacuum A .v inthe former andmeans vconnecting saidair "i j' l supply .to said iill'erxspout.

2.1 ln Y combinatiom-an exhaust manifold,` i

the exhaust gases to causefa. partial vacuum in said crank case, abaille protectingthe end j 'i ofsaid .pipe connectedv to said chamberv and`v` means connecting said filler spout to said air inlet or'supplying air to said crankcase" to ,dissipateV 'said vacuum. Y

`1 4."ln combination a'fcarburetor, lf an air l fiilter forthe carburetony a crank case, means for inducing a vacuumin the crank case,` any oil filler. spout. forthecrankfcas'e, ,and aconduit connecting the ,air Vfilter andthe `carbu`-` retor; the said conduit having an upwardly lillenspout. f'ln combination, a cra'nlrcase having an "extendingfportion opening `into the'said Oil oil filler spout, means yfor creating a v.vacuum in 'tlie[ crankfcase`,1 and a'` carburetor air sup' ply:conduithavinga laterally 'i extending 7. `branch 1 comniunicating1` v vithf'the" oil 'illerf j spout. .Yew GQln combinationafcrank case'anv oil iller'spout for. said crankl case, a carburetor,

conducting air from said iilter' to said filler spout, an exhaustmanifold, achambercon- `an air liltei` for the lcarburetor,y a connection between lthe Lair.v tilter and VtheV carburetor,

Vthe,said;connection having a portiony co1n' inunicating Withthe '.saidoil-illerf spout for nected to Y'said crank. case, a pipe extending from said chamberfto said exhaust manifold! Withthe open end thereofi'disposed yin the, di-

5a carburetor air supply conduit, acrank case i provided with an oiliiller'spout, anejector f Vpipe extending'into. said exhaust manifold and connected to said cranlrc'ase for inducing i u a vacuum inthe latterandmeans connecting f Y f Y "saidiairsupplyconduit to saidiil'lerj spout for x combination, acranl; case providedfvvithan buretorair'inlet5a clianiberconnected to said crankcas'e5 apipe extending ifi/"o in's'aid' cham-` beij to said yexhaust pipe Withtheopen endl thereof disposed in the direction of flow `Qi:`. j.

Yrection oit-flow vof the exhaust gases" through Lsaid manifold 'to'causeapartial vacu'iuim inVV `Y fsaidvzcranli. case, anda baiiie protecting'the endof said. pipe, fsa-id bathe being Vconnected` .tosaidcha'mben 7 i 1; In testimony Wherevofl afiixjmy. signature.. Y EARLE Si;V MAQPHERSON.-

hlt) 

